Feed-water purifier.



T. 0. ORGAN. FEED WATER'PURIPIER. APPLICATION Hum' Nov.12.19o2.

N0 MODEL.

NITED STATES Patented ctcber 6, 1903.

THOMAS O. ORGAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TORICHARD NORRIS, OF BRYN MAWR, PENNSYLVANIA@ FEED-WATER PU RIFlER.

SPECIFICATION forming part of Letters Patent No. 740,904, dated October6, 1903.

Application filed November 12, 1902/. Serial No. 131,032. (No model.)

To all whom it may concern:

Be it known that I, THouAs O. ORGAN, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, haveinvented certain new anduseful Improvements inFeed- Water Purifiers; and I do hereby declare thefollowing to be at ull, clear, and exact description of theinvention,such as will enable others automatically preventing steam frompass ing to the supply or suction pipe in the event of the exhaustion otthe chemicalcompound and also to prevent backow through the apparatusshould a vacuum be created inthe chemical-tank by reason of thecondensation of steam therein.

The invention will be hereinafter fully set `forth, and particularlypointed out in theV claims.

In the accompanying drawings, Figure lis a vertical longitudinalsectional view showing my apparatus connected with steam and pump lines.Fig. 2 is an enlarged vertical sectional view through thecontrolling-valves and air-chamber. Fig. 3 is a similar view of thesight-feed. x i

Referring to the drawings, 1 designates a chemical-tank, into the top ofwhich opensa steam-pipe 2, leading from steam-line 3, such pipehaving avalve et therein. "Also open- V ing through the top of this tank is asupplyfunnel 5, having a valve 6. A discharge-pipe 7 extends upwardlythrough tank 1 from a point near the bottom thereof and out through thetop, leading to what I term an air-tank 8, a sight-feed tube 9 and aneedle-regulating valvelO being interposed between the tank and the endof pipe 7.' Y his sight-feed tube is preferably screwed into the top oftank 8, and upon its threaded boss 10' is anut 12, into the chamberedportion of which the chemicals passing downwardly through the boss aredischarged through horizontal Y,

ports 13 and thence into tank 8. In one side of the sight-feed tube isan air-valve le and in itsloack is a plug l5. In the side of tank 8 is adrain-valve 15a.

16 is an air-supply chamber secured to the lower end of tank 8 andcommunicating therewith through a centrally-bored plug 17, the ends ofsuch bore forming upper and lower Valve-seats 18 and 19. This chamber isequipped with an air-Valve20 and a drainvalve 2l. and is connected atits lower eind by a pipe 22 to a suction or supply pipe 23, a valve 24being placed in said pipe 22. pipe 23, which is connected to the suctionside of a pump or toa tank or closed feedwater heater, leads from thecity-su pply service or from a storage-tank or other source ofwater-supply, water passing therethrough under pressure.

25 and 26 designate two valves designed, respectively, to be seatedagainst seats 13 and 19, but under normal conditions are held in balanceaway from their seats. These, valves are mounted on a stem 27, extendedcentrally into the bore connecting the sightfeed tube with the tank S. afloat 28. When the two valves are thrown in balance, they are held bythe tioat in the position shown in Fig;2, and when in this position theupper end ot the valve-stem is in line with the upper end of the boreleading from the sight-tube and is visible to the operator. 29 isanair-valve located in tankl at what should be the highest limit of thechemicals contained in such tank.

In practice valves 4 and 10 are closed and the chemical compound issupplied through funnel 5, valve 6 being unseated. When the chemicalsrise in tank 1 up to 'Valve 29Which latter is open during thelillingoperation, further supply is cnt ott and the valve 29 is On thisstem is.

This

closed. Steam is then admitted through pipe A ILO sary to throw thevalves 25 and 26 into balance with air and a column of water in tank 8and water in chamber 16. Vhen the valves 25 and 26 are balanced, thefloat is about one- -half submerged in the Water, its stem being thuscoincident with the top of boss 10. Assuming that the apparatus has beenpreviously employed for this purpose, to charge the tank 8 With theproper quantity of air and water valve 24 is closed and valves 2O and 21of the air-supplychamber are opened, the latter valve admitting ofdrainage, and after this is completed these two valves 20 and 21.

are reclosed and valve 24 is opened, permitting the pressure in pipe 22to force the air from chamber 16 into tank S and up into the sight-feedtube. If there be not sufficient air compressed at the first operationjust dcscribed-that is, if there be not the proper quautitity of air andwater within tank 8 to make the upper end of the valve-stern aline withthe upper end of boss 10athe described steps are repeated. In thus againopening the valves of the air-supply chamber 16 Water therein is allowedto flow outwardly, the escape from the tank 8 being cut off, however, bythe seating of valve 25. The reopening of valve 24 after valves 2O and21 have been reclosed will, as before, force the air from chamber 16into tank 8. If there is too little water or an overpressure of air intank 8, the valve-stem will not be visible through the sight-feed tube,and if too much watenand an insuiiicient quantity of air are present thestem will rise too high, and hence keep valve 26 closed. When there isany overpressure of air, escape is permitted through the valve 14.After-the float-valves are properly adjusted the pressure of the columnof air equals that of the water, so that every drop of liquid chemicalsunder the steam-pressure from the main steam-li ne must pass through thecolumn ot air and into the water-supply pipe, and in so passing throughthe air is visible to the operator. Now that the valves 25 and 26 arethrown into balance the needlewalve 10 may be opened, it beingunderstood. that steam-pressure is already present in tank 1. Thus theliquid chemicals will iiow through the sight-feed tube through thecolumn of air and into a liquid of lower pressure than the pressure onthe chemicals, the latter passing from tank 8 into chamber 16, andthence through pipe 22 into the suction or supply pipe 23, by which itis conveyed to the tank, closed feed-water heater, or pump.

Should the supply of chemicals in tank 1 become exhausted and steam passoutwardly through pipe 7, immediately upon entering tank 8 the valve 25would be seated, thus preventing the passage of the steam to the suctionor supply pipe. In the event of the steam-supply to the chemical-tankbeing cut off the steam contained in such tank upon being condensedcreates a vacuum therein, having a tendency to cause the water to risethrough the air-chamber 16; but it is prevented fromv passing beyondsuch chamber and also beyond tank S by the immediate seating of valve26. Hence itwill be seen that lthe chemical compound is not onlyautomatically'fed to the suction or su pply pipe, but all dangerconsequent upon the supply of chemicals being eX- hausted or thecreation of a vacuum in the chemical-tank is successfully avoided.

The advantages of my invention are apparent to those skilled in the art.It will be especially observed that in accordance therewith I am enabledto pass a column of liquid chemicals under high pressure through a co1-um n of air into a liquid of lower pressure and that the quantity of thechemicals s0 passed may be regulated by the adjustment of valve 10, andthe amount supplied is always in View of the operator through thesight-feed tube. By myimproverneut I am enabled to prevent the ejectionof large quantities of chemicals into the.boiler feed-water, therebyavoiding the danger consequent upon the ereation of foam in the boiler,the quantity of chemicals supplied being sufficient to effectprecipitation in the tanks or closed feed-water heater. By maintaining aregular feedsupply of the precipitating chemicals better results areobtained than if the precipitants were periodically injected direct intothe boiler.

I claim as my invention-- 1. In a feed-water purifier, achemical-containing tank, means for forcing the chemicals therefromunder steam-pressure, and an apparatus intermediate such tank and asuction or supply pipe of a closed feed-water heater, tank or pump, suchapparatus containing a column of compressed air equal to the pressure inthe suction or supply pipe, and through which column of air thechemicals pass to the said suction or supply pipe, as set forth.

2. In a feed-water purifier, a chemical-containing tank, means forforcing the chemicals therefrom under steam-pressure, an apparatusintermediate said tank and a suction or supply pipe havingmcansforstoringacolumn of air therein of pressure equal to the pressureof water in said pipe, and means for con-` trolling the passage of thechemicals, under the action of the steam, from said tank to saidapparatus, as set forth.

3. In a feed-water purifier, a chemical-containing tank, means forforcing the chemicals therefrom under steam-pressure, an air-tankintermediate said former tank andthe supply or suction pipe of a tank,feed-water heater, or pump, said air-tank being designed to contain acolumn of air of pressure equal to that in the said supply-pipe, andmeans for automatically cutting olf communication between the air-tankand the said suction or supply pipe in the event of the column of airbeing destroyed by the exhaustion of the supply of chemicals or thecreation of a vacuum inthe chemical-tank, as set forth.

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4. The combination with the chemical-containing tank, the steam-pipeopening therel delivery-pipe into said air-tank, substantially as setforth.

5. The combination with the chemical-containing tank, the steam-pipeopening thereinto at one end, and the delivery-pipe leading from nearthe other end of such tank, of the air-tank into which saiddelivery-pipe discharges, the supply or suction pipe of a tank,feed-water heater, or pump, a passage-way between said tank and saidlatter pipe, an air-supply chamber intermediate said suction or supplypipe and said air-tank, means for admitting air to such chamber, and avalve intermediate the latter and said suction or supply pipe, saidvalve when opened permitting the pressure in the supply-pipe to forcethe air from said chamber to said tank, as set forth.

6. The combination with the chemical-containing tank, the steam-pipeopening thereinto at one end, and the delivery-pipe leading from nearthe other end of such tank, of the air-tank linto which saiddelivery-pipe discharges, the supply or suction pipe of a tank,feed-water heater, or pump, a passage-Way between said tank and saidlatter pipe, means for storing air in said tank at a pressure equal tothat in the suction or supply pipe, and means for automatically cuttingoff communication between said air-tank and said suction or supply pipein the event of the-column ot air being broken, as set forth.

7. The combination with the chemical-containing tank, the steam-pipeopening thereinto at one end, and the delivery-pipe leading from nearthe other end of such tank, of the air-tank into which saiddelivery-pipe discharges, the supply or suction pipe of a tank,feed-water heater, or pump, a passage-way between said tank and saidlatter pipe, an air-supply chamber intermediate said suction or supplypipe and said air-tank, means for admitting air to such chamber, a valveintermediate the latter and said suction or supply pipe, said valve whenopened permitting the pressure in the supply-pipe to force the air fromsaid chamber to said tank, and means for automatically cutting edcommunication between said air-tank and air-chamber in the event of thecolumn of air being broken, as set forth.

8. The combination with the chemical-containing tank, the steam-pipeopening thereinto at one end, and the delivery-pipe leading from nearthe other end of the tank, of the air-tank, a sight-feed tube betweensaid airtank and the delivery-pipe, a valve controllingr the admissionto sight-feed tube, an airchamber connected to said tank, a pipeconnecting said air-chamber to the suction or supply of a tank,feed-water heater, or pump, means for forcing the air from saidair-chamber into said tank, a valve-stemhaving two valves for cuttingoff communication between said tank and air-chamber, said valves being Ynormally h eld away from their seats, and said valve-stem being extendedinto said sightfeed tube, as set forth.

9. The combination with the chemical-containing tank, the steam-pipeopening thereinto at one end, and the delivery-pipe leading from nearthe other end of the tank, of the air-tank, a sight-feed tube having apassageway opening into said air-tank, a valve for controlling thedischarge into said sight-feed tube, an air-chamber opening into saidairtank, Valves in said air-chamber, a pipe connecting said air-chamberto the suction or supply pipe of a tank, feed-water heater, or pump,a-valve in said pipe a valve-stem extended into said passage-way of thesightfeed tube, two valves on'said stem for controlling communicationbetween said airchamber and lair-tank, and a oat on said stem,substantially as set forth.

10. The combination with the chemicaltank, the steam-pipe and thedelivery-pipe, of the air-tank, the sight-feed tube having a passage-wayopening into said air-tank, an air-chamber having a passage-way openinginto said air-tank provided with upper and lower valve seats, means foradmitting air to said air-chamber, a valved pipe connecting saidair-chamberwith the suction or supply pipe of a tank, feed-water heater,or pump, upper and lower valves designed to be seated against said seatsfor closing communication between the air-tank and air-chamber, a stemfor said valves extended into said passageway of the sight-feed tube,and a iioat on said stem, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

rrnos. o. oRoAN.

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